# The volume of cubic shape and the area of a square are equal to 64.A student is asked to find cost of a boundary of a rectangular field whose length is side of cube and breadth is side of square,if the cost is R's 15 per unit?

Aug 4, 2018

color(violet)("Cost of boundary " = (2*l + 2 * b) * 15 = Rs 360"/="

#### Explanation:

$\text{Vol. of cube " V_c = 64 " or side } {a}_{c} = \sqrt[3]{64} = 4$

$\text{Area of square " A_s = 64 " or side } {a}_{s} = \sqrt{64} = 8$

$\text{Now the rectangular field will have Length l = 8, breadth b = 4}$

$\text{Cost of boundary " = (2 l + 2 b) * "cost per unit}$

color(violet)("Cost of boundary " = (2*8 + 2 * 4) * 15 = Rs 360"/="